Single cylinder engine construction



April l0, 1956 P. ALTMAN ETAL SINGLE CYLINDER ENGINE CONSTRUCTION E l s T Dn T .Tv 0 E e T N M e .n M B O V ANH m .n W. M T. A e T e M D R 2 H Mn Y T C n m ,Il /x L l/l/l/. Y Il# B r 3 l l l l s vlunmu L w/ l l ,d m... S 6 7 l .l TL

April 10, 1956 P. ALTMAN ErAL sINCLE CYLINDER ENGINE CONSTRUCTION 2 Sheets-Sheet 2 Filed sept. s, 1953 IN V EN TORS ATTORNEYS 741,236 .i lslNGLE CYLNDER jENGINE- GGNSTRUCTION jAsiseen'in-:Figj1gthesing1e cylinder engine 1o is'fpi'e-v if. 2,741,236 VPitented Apr. 10, 1956 not prevent removal of therassernbly 22, Vbeing substantially off-center with respect thereto.

For insertion of the assembly 22 into operating position in housing 12,V the reverse order for removal is observed. By this novel and unique construction, the entire manufacture and servicing of these engine cornponents has been extremely simplified, and compactness of engine 10 has been achieved. Y It will be apparent to those skilled in the art` to which this invention pertains rthat various modifications and changes may be made without departing from the spirit of the invention or from the scope'of the appended claims. Y Y Y I claim: Y

1. In an internal combustion engine provided with a crankcase and a rotating engine element supported by said crankcase, an engine cylinder carried by the crankcase, said crankcase having an opening therein downwardly into the crankcase,finterior, a unitary accessory assembly for said engine comprising a supporting strncture having a cap portion fitted into said opening and serving as a closure therefor and provided with spaced upper and lower bearing supports, a shaft rotatably supported by said bearing supports and projecting above the top face of said cap portion, an ignition circuit breaker assembly carried by the projecting shaft portion, a cover for said ignition circuit breaker assembly and attached to the aforesaid cap portion, and a governor mechanism mounted on said shaft intermediate said upper and lower bearing supports', and a drive pinion von said shaft drivingly connected with said rotating engine element and located intermediate of said bearing supports.

2. In an internal combustion engine provided with a crankcase and a rotating engine element supported by said crankcase, an engine cylinder carried by the crankcase, said crankcase having an opening therein downwardly into the crankcase interior, a unitary accessory assembly for said engine comprising a supporting structure having a cap portion fitted into said opening and serving as a closure therefor and provided with spaced upper and lower bearing supports, a shaft rotatably supported by said bearing supports and projecting above the top face of said cap portion, an ignition circuit breaker assembly carried by the projecting shaft portion, a cover for said ignition circuit breaker assembly and attached to the aforesaid cap portion, and a governor mechanism mounted on said shaft intermediate said upper and lower bearing supports, and a drive pinion on said shaft drivingly connected with said rotating engine element and located intermediate of said bearing supports, said pinion comprising a common drive for said governor and said ignition circuit breaker and disposed immediately below said governor and above said lower bearing support.

3. In an internal combustion engine provided with a crankcase and a rotating engine element supported by said crankcase, an engine cylinder carried by the crankcase, said crankcase havingV an opening therein downwardly into the crankcase interior, a unitary accessory assembly for said engine comprising a supporting struc-l ture having a cap portion fitted into said opening and serving as a closure therefor and provided with spaced upper and lower bearing supports, a shaft rotatably supported by said bearing supports and projecting above the top face of said cap portion, an ignition circuit breaker assembly carried by the projecting shaft portion, a cover for said ignition circuit breaker assembly andattached to the aforesaid cap portion, and a governor mechanism mounted on said shaft intermediate said upper and lower bearing supports, and a drive pinion on said shaft drivingly connected with said rotating eng'me ele ment and located intermediate of said bearing supports,-

said pinion comprising a common drive for said governor and said ignition circuit breaker and disposed immediately below 'said governor and above said lower bearing support, said accessory assembly constructed and arranged for assembly through the aforesaid crankcase opening and extended into the crankcase interior between the rotating engine element and a wall of the crankcase.

4. In an internal combustion engine provided with a crankcase and a rotating engine element supported by said crankcase, an engine cylinder carried by the crankcase, said crankcase having an opening therein downwardly into the crankcase interior, a `unitary accessory assembly for said engine comprising a supporting struc ture having a cap portion fitted into said opening and serving as a closure therefor and provided with spaced upper and lower bearing supports, a shaft rotatably, supported by said bearing supports and projecting above the top face of said cap portion, an ignition circuit breaker assembly carried by the projecting shaft portion, a cover for said ignition circuit breaker assembly and attached to the aforesaid cap portion, and a governor mechanism mounted on said shaft intermediate said upper and lower bearing supports, and a drive pinion on said shaft drivingly connected with said rotating engine element and located intermediate of said bearing supports, said pinion comprising a common drive for said governor and said ignition circuit breaker and disposed'immedb Yately below said governor and above said lower bearing support, said accessory assembly constructed and arranged for assembly through the aforesaid crankcase opening and extended into the crankcase interior between the rotating engine element and a wall of the crankcase, said lower bearing support providing an oil pump recess at its lower extremity, an oil pump assembly` mounted in said recess and drivingly connected with said shaft.' 5. In an internal combustion engine provided with a crankcase and a rotating engine element supported by said crankcase, an engine cylinder carried by the crankcase, said crankcase having an opening therein downwardly into the crankcase interior, a unitary accessory assemblyV for said engine comprising a supporting structure having a cap portion tted into said opening and serving as a closure therefor and provided with spaced upper and lower bearing supports, a shaft rotatably supported by said bearing supports and projecting above the top face of said cap portion, an ignition circuit breaker assembly carried by the projecting shaft portion, a cover for said ignition circuit breaker assembly and attached to the aforesaid cap portion, and a governor mechanism mounted on said shaft intermediate said upper and lower bearingsupports, and a drive pinion on said shaft drivingly connected with said rotating engine element and located intermediate of said bearing supports, said pinion comprising a common drive forl'said governor and said ignition circuit breaker and disposed immediately below said governor and above said lower bearing support, said accessory assembly supporting structure having a reduced diametric cross-sectional dimension below said cap portion permittingdsaid assem bly to be Vtilted during assembly whereby to facilitate the passage of the lower bearing support and pinion in the limited space between the engine rotating element andthe crankcase wall and yat the nal assembly Vallowing for.

positioning of said shaft and bearing supports inaxial alignment with said crankcase opening and to engage said pinion with said rotating engine element.

6. In an internal combustionengine provided with a crankcase and a rotating engine element supported -by said crankcase, an engine cylinder carried by the crankcase, said crankcase having an opening therein downwardly. into the crankcase interior, a unitary accessory assembly l, for, said engineicomprising a supporting structure having a cap portion titted into said opening and serving as a.

closure therefor and provided with spaced upper and lower bearing supports, a shaft rotatably supported by saidV bearing supports and projecting above the top face of said eap'portion, an ignition circuit breaker assembly carried by the projecting shaft portion, a cover for said ignition circuit breaker assembly and attached to the aforesaid cap.

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portion, and a governor mechanism mounted on said shaft intermediate said upper and lower bearing supports, and a drive pinion on said shaft drivingly connected with said rotating engine element and located intermediate of said bearing supports, said pinion comprising a common drive for said governor and said ignition circuit breaker and disposed immediately below said governor and above said lower bearing support, said accessory assembly supporting structure having a reduced diametric cross-sectional dimension below said cap portion permitting said assembly to be tilted during assembly whereby to facilitate the passage of the lower bearing support and pinion in the limited space between the engine rotating clement and the crankcase wall and at the nal assembly allowing for positioning of said shaft and bearing supports in axial alignment with said crankcase opening and to engage said pinion with said rotating engine element, said supporting structure provided with an intermediate back structure integral with and connecting said upper and lower beaiing supports, said back structure fitted snugly against the inside face of the crankcase wall at final assembly.

7. In an internal combustion engine provided with a crankcase and a rotating engine element supported by said crankcase, an engine cylinder carried by the crankcase, said crankcase having an opening therein downwardly into the crankcase interior, a unitary accessory assembly for said engine comprising a supporting structure having a cap portion tted into said opening and serving as a closure therefor and provided with spaced upper and lower bearing supports, a shaft rotatably supported by said bearing supports and projecting above the top face of said cap portion, an ignition circuit breaker assembly carried by the projecting shaft portion, a cover for said ignition circuit breaker assembly and attached to the aforesaid cap portion, and a governor mechanism mounted on said shaft intermediate said upper and lower bearing supports, and a drive pinion on said shaft drivingly connected with said rotating engine element and located intermediate of said bearing supports, said pinion comprising a common drive for said governor and said ignition circuit breaker and disposed immediately below said governor and above said lower bearing support, said accessory assembly constructed and arranged for assembly through the aforesaid crankcase opening and extended into the crankcase interior between the rotating engine element and a wall of the crankcase, said lower bearing support providing an oil pump recess at its lower extremity, an oil pump assembly mounted in said recess and drivingly connected with said shaft, said accessory assembly supporting structure having a reduced diametnc cross-sectional dimension below said cap portion permitting said assembly to be tilted during assembly whereby to facilitate the passage of the lower bearing support and pinion in the limited space between the engine rotating element and the crankcase wall and at the final assembly allowing for positioning of said shaft and bearing supports in axial alignment with said crankcase opening and to engage said pinion with said rotating engine element, said supporting structure provided with an intermediate back structure integral with and connecting said upper and lower bearing supports, said back structure fitted snugly against the inside face of the crankcase wall at nal assembly, said supporting structure provided with a drilled oil passage connected with the oil pump outlet and opening into the outer face of said intermediate back structure, said crankcase having an oil passage registering with the aforesaid drilled oil passage outlet in said supporting structure.

8. In combination an engine having a crankcase strucune having an opening, a cam shaft rotatably supported thereby, a unitary accessory structure comprising an ignition circuit breaker and governor assembly, a one-piece trame structure having bearings and a common drive shaft supported by said bearings and carrying said governor and the rotor of said circuit breaker, a drive gear secured to said drive shaft and driven from said camshaft, said frame structure having an end plate carrying one of said bearings and providing a closure for the opening in said crankcase structure and locating said frame structure on assembly thereof with the engine crankcase, said frame structure fitted into said crankcase opening and disposing said governor and drive gear interiorly of said crankcase, said ignition circuit breaker assembly carried in its entirety by said frame structure whereby to adapt said unitary accessory structure assembly for insertion into and removal from said crankcase opening.

9. In combination, an engine, a housing for said engine having an opening therein and a fluid passageway therethrough, a unitary oil pump and ignition circuit breaker assembly for said engine adapted to be inserted into and removed from said engine housing as a unit through said engine opening, a second opening in said engine housing transverse to said first opening, and plug type tube means adapted to iit into and plug said second opening and to provide a uid connection between said unitary assembly and said engine housing fluid passage- Way when said unitary assembly is positioned in said engine housing.

References Cited inthe file of this patent UNITED STATES PATENTS 1,287,351 Laporte et al. Dec. 10, 1918 1,422,995 Link July 18, 1922 1,626,364 Starr Apr. 26, 1927 1,743,586 Wiltse Ian. 14, 1930 2,347,096 Ginn Apr. 18, 1944 

